{"product_id":"9780986091766","title":"2 Digit Addition and Subtraction: A mathematics unit based on inquiry, problem solving, and student discourse","description":"A 30 day, developmentally-based, unit for teaching addition and subtraction with regrouping to second graders. This unit uses problem solving and student discourse as a means to help children to build conceptual understanding around addition and subtraction.","brand":"Lisa Ann de Garcia","offers":[{"title":"Default Title","offer_id":50091387551984,"sku":"9780986091766","price":14.99,"currency_code":"USD","in_stock":false}],"url":"https:\/\/shop-qa.barnesandnoble.com\/products\/9780986091766","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}